<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>这是通配选择器</title>
  <style>
    *{font-weight: bold;
      text-align: center;
      color: red;}
  </style>
</head>
<body>
<p id='test' class='title'>Hello world!</p>
</body>
</html>